Kook is a term, most often used by aggro locals, to describe any surfers that:
- don't live in the shithole little coastal towns
- don't work construction and/or drive old, beat-up trucks
- pretend like they can surf when, in reality, they suck-ass
- don't follow the rules of the lineup
- show up in the lot with a frappachino, excited about 2-footers

However, the term kook has a different meaning to different types of surfers. It is most likely the case that every surfer, at one point or another, has been called a kook themselves and has called other surfers kooks. You don't have to be an asshole local to enjoy this fun, degredating term!!!

"That guy has a surf-rack on a land-rover, what a kook!"
"Hey Kook, get off my wave!!"

a kook is a poser who turns up in the beach car park wearing a top of the range wetsuit and carrying a spanking new surfboard, checks the surf for an hour before actually going in, when it is so obviously pumping, then when he enters the water proceeds to splash around like a drowning rabbit. tip stay at home

kook: A person posing as a surfer, or telling everyone that he can bust a snap, bottom turn, or barrel when they can't. Does not know the proper surf terminology or vocab. Ie. uses terms that don't make any sense

Non-kook: A person being honest about their surfing ability. Honestly expresses their surfing ability. Does NOT drop in on other surfers or snake them. Follows the rules of the lineup.

Kook: "So yea, I was out busting some gnarly pounders when this huge curler came through and swamped me. Lucky for me I just jumped on my board and threw a gnarly air over the white wash without even trying. Hee hee hee."

Surfer: "Awww man. That last set was a clean out. I got hit pretty bad. Damn thing held me down for a while. Hey heres a good set. By the way you can bust a pretty solid snap on these. Not much force though. You have to really paddle for these."

OR

"Did you see that air? I was worried that I was going to break my board that time. But this kook dropped in on me and freakin' nearly took my head off. It's all good but...